Dell PowerVault ME4 Series Storage System CLI Guide

Volume sizes are aligned to 4.2 MB (4 MiB) boundaries. When a volume is created or expanded, if the resulting size would be less than 4.2 MB it will be increased to 4 MB; if the resulting size would be greater than 4.2 MB it will be decreased to the nearest 4.2 MB boundary.

For virtual storage, if overcommit is disabled, expansion is restricted to the space available in the pool that contains the volume. If overcommit is enabled, the volume size can exceed the physical capacity of the pool. To see whether overcommit is enabled, use the show pools command. The maximum size of a virtual volume is 140 TB (128 TiB).

• When the overcommit feature is disabled, the host does not lose read or write access to the pool volumes when the pool reaches or exceeds the high threshold value.
• When the overcommit feature is enabled, the storage system sends the data protect sense key Add, Sense: Space allocation failed write protect to the host when the pool reaches or exceeds the high threshold value. If the host is rebooted after the pool reaches or exceeds the high threshold value, the host loses read and write access to the pool volumes. The only way to regain read and write access to the pool volumes is to add more storage to the pool.

For linear storage, if insufficient space is available for expansion in the disk group, first expand the disk group by using expand vdisk. The maximum size of a linear volume is equal to the maximum size limit of the disk group.

expand volume

size size[B|KB|MB|GB|TB|KiB|MiB|GiB|TiB] | max

volume

The name or serial number of the volume to expand. A name that includes a space must be enclosed in double quotes.

Expand volume V1 by 100 GB.

# expand volume size 100GB V1

expand disk-group

expand vdisk

show volumes